package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.exception.SetmealEnableFailedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.List;

/**
 * 套餐管理
 * @author
 * @date
 */
@Service
public class SetmealServiceImpl implements SetmealService {


    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;
    @Autowired
    private DishMapper dishMapper;

    /**
     * 增加套餐
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal=new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        //增加套餐基本信息表
        setmealMapper.insert(setmeal);
        Long setmealId=setmeal.getId();
        //增加套餐菜品关系
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
           setmealDish.setSetmealId(setmealId);
        });

        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐-分页查询+条件
     * @param setmealPageQueryDTO
     * @return {@code PageResult }
     */
    @Override
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(),setmealPageQueryDTO.getPageSize());
        Page <SetmealVO> page=setmealMapper.pageQuery(setmealPageQueryDTO);
       /* PageResult pageResult=new PageResult(page.getTotal(),page.getResult());
        return pageResult;*/
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 批量删除套餐
     * @param ids
     */
    @Override
    public void deleteBatch(List<Long> ids) {
        //起售的套餐不能删除
        ids.forEach(id->{
            Setmeal setmeal=setmealMapper.getById(id);
            if (setmeal.getStatus()== StatusConstant.ENABLE){
                throw new DeletionNotAllowedException(MessageConstant.DISH_ON_SALE);
            }
        });
        ids.forEach(setmealId -> {
        //删除套餐
        setmealMapper.deleteById(setmealId);

        //删除套餐菜品
        setmealDishMapper.deleteById(setmealId);
        });
    }

    /**
     * 查询回显
     * @param id
     * @return {@code SetmealVO }
     */
    @Override
    public SetmealVO getById(Long id) {
        //根据id查询套餐信息
        Setmeal setmeal=setmealMapper.getById(id);
        //根据id查询套餐菜品关联信息
       List<SetmealDish>  setmealDishes=setmealDishMapper.getSetmealDishById(id);

        SetmealVO setmealVO=new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);

        setmealVO.setSetmealDishes(setmealDishes);
        return setmealVO;
    }

    /**
     * 修改套餐
     * @param setmealDTO
     */
    @Override
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        //修改套餐信息
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO,setmeal);
        setmealMapper.update(setmeal);


        //套餐id
        Long setmealId=setmeal.getId();

        //删除菜品套餐信息
        setmealDishMapper.deleteById(setmealId);

        //增加菜品套餐信息
        List<SetmealDish> setmealDishes=setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmealId);
        });
        setmealDishMapper.insertBatch(setmealDishes);

    }

    /**
     * 套餐起售停售
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //如果是起售，判相关菜品是否停售，如果停售提示不能操作
        if(status==StatusConstant.ENABLE){
           List<Dish> dishList=dishMapper.getBySetmealId(id);
           //判断套餐有没有菜品
            if(dishList!=null&& !dishList.isEmpty()){
                dishList.forEach(dish -> {
                    //判断菜品是否停售
                    if(dish.getStatus()==StatusConstant.DISABLE){
                        throw new SetmealEnableFailedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                    }
                });
            }
        }

        //设置套餐状态
        Setmeal setmeal =Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);

    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }


}
